Ramban

ONLY FLESH WITH THE LIFE THEREOF, THE BLOOD THEREOF, SHALL YE NOT EAT. Rashi wrote: “This prohibition applies while the animal’s life is still in the blood. Thus, you should not eat flesh as long as there is life in it, meaning a limb cut from a living animal, nor shall you eat its blood together with its life, meaning the blood of a living animal.” (with its life) with the preceding word, basar, and also with the succeeding word, damo (its blood), although the text reads, basar b’naphsho damo. Ramban objects that if so the text should have said, v’damo (and its blood), instead of damo. But if this be so Scripture should have said, “flesh, so long as there is life in it, and also its blood ye shall not eat.” But according to the simple meaning of Scripture, this interpretation is incorrect, and according to the Midrash it is not true, for the sons of Noah, Note 222. have been admonished against eating a limb cut from a living animal, as is the opinion of the Sages, but not the blood of a living animal, as is the opinion of Rabbi Chanina ben Gamliel. Rather, the interpretation of the verse is as follows: “only flesh with the life thereof, which is the blood thereof, shall you not eat,” for the life of all flesh is the blood thereof.